242831 has 4 divisors (see below), whose sum is σ = 249432. Its totient is φ = 236232.

The previous prime is 242819. The next prime is 242863. The reversal of 242831 is 138242.

242831 is nontrivially palindromic in base 6.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 242831 - 2¹⁰ = 241807 is a prime.

It is a super-2 number, since 2×242831² = 117933789122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3245 + ... + 3318.

It is an arithmetic number, because the mean of its divisors is an integer number (62358).

2²⁴²⁸³¹ is an apocalyptic number.

242831 is a deficient number, since it is larger than the sum of its proper divisors (6601).

242831 is an equidigital number, since it uses as much as digits as its factorization.

242831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6600.

The product of its digits is 384, while the sum is 20.

The square root of 242831 is about 492.7788550658. The cubic root of 242831 is about 62.3880449100.

It can be divided in two parts, 242 and 831, that multiplied together give a palindrome (201102).

The spelling of 242831 in words is "two hundred forty-two thousand, eight hundred thirty-one".